Improvement in holders for grinding harvester-cutters



' M. M coPP.

HOLDERS FOR GRINDING HARVESTER-CUTTERS. No. 173,590. Patented Feb. 15, 1876.

N-Pm PNOTO-UTHOGRAPHER, WMMINGTON' DJ}.

UNITED STATES PATENT OFFICE.

MONROE corr, or ROCHESTER, NEW YORK.

IMFROVEMENT m HOLDERS FoR GRINDING HARVESTER-CUTTERS.'

Specification'forming part of Letters Patent No. 173,590, dated February 15, 1876; application filed i October 11, 1875.

To all whom it may concern Be it known that 1, MONROE M. Corr, of

the city of Rochester, in the county of Moners for Grinding Harvester-Gutters and I do hereby declare the following to be a full, clear, and exact description of the construction and operation of the same, sufficient to enable those skilled in the art to which it appertains to construct and make use of the invention, reference beinghadto the drawings accompanying this specification and to the figures and letters of referencemarked thereon, in which like letters refer to like parts throughout the same, and on'which Figure lrepresents the top of the invention as applied to the frame of a grindstone. Fig. 2 represents the side of the invention.

Fig. 3 represents a detail section of the balland-socket or universal joint.

My invention is a device for holding harvester-cutters, in grinding the same.

Up tothe present time inventions for holding harvester-cutters while being ground have been either too complicated or too costly to be adopted by'those -for whom they'were intended. But as most farms have grindstones upon them, any deviceso contrived as to be readily applied to this implement will meet a Wantof those using harv'est'er or mowing-machine cutters; and

The object of my invention is to rigidly hold the cutter to the stone while being ground, and its edge at any desired angle with the face of thesame at the same time, to leave all.

the cutter-teeth with a uniformly straight edge and true basil, and enable a person ofordinary skill to keep them in this condition.

It consists in a slotted iron bar, affixed to the frame of the grindstone, on which stands an A-shaped metal frame-the vertex of which is a ball or spheroid and socket, forming a universal joint, the=spheroid springing from a gyrating bar, on which bar is constructed gripes forming a clamp, holding the cutterbar, and other fixtures which will now be described.

A A, Fig. 1, represent the side, and B, the end, bars of an ordinary wood grindstoneframe, to which is applied my improvement.

'In the space E, formed between said bars,

rotates the grindstone G, which, with the said bars, are shown in the drawing as broken off at 0 c.

On this frame, at any preferred distance in' the rear of the stone, is transversely attached I a metal bar, 4", about three-fourths inch wide by one'fourth of an inch thick, for afoothold for the A-shaped metal frame 1), and in its relations to the stone a desirable position for the same. For this object, further, in obtaining desirable bearings on the stone, the slots 8" in said bar 1' permit either way a lateral movement, for which the screws 8 are slackened. Growing out of, and about one-half inch above, the bar 1', are the bent studs 0, on which, by means of the perforations p, are retained the feet f of the frame I). These feet are formed by bending the lower ends of the legs 9 at an angle of about thirty degrees outward, and sufliciently flattening the same i movement of the cutter when grinding the same.

In size, the legs 9 and cross bar b of the. frame D are about one-half by one-fourth inch, and legs twelve inches long, and the distance of the feet apart is regulated by the cross-bar b,- and to make the frame rigid when grinding the cutters they are set over the side bars 'A of the frame. The legs .9 of the frame D are formed at the apex 00 into a cupshaped ring or washer, 6, having a large orifice, o, and reamed out to its center from both sides to a V-shaped bevel, for fitting the ball or spheroid L on its under side and its top side, for acting against the sides of the threaded bolt W, permitting it to occupy any position on the spheroid L for the clamp-bar [:l in its relations to the stone. The clampbar H is of preferred dimensions, about onefourth by one inch, while projecting parallel to and about seven-eighths of an inch from its under side is a flange, "i, forming the lower jaw of the gripe or clamp for the clamp-barlil, one-fourth of an inch thick, and opposite to this,on the upper side of the bar, is a detachable upper jaw, j, having at its rear end 11 a flange, at, extending down the back edge of the bar, securing the loose jaw against a vibratory motion in manipulating the clamp. For rigidly clamping the knife-bar F'between the jawsz' and j, the carriage-bolt 1 passes, from the under side, the bar H, and both of said jaws, when the nut 'n is turned down, securing the cutter-bar as desired. On the upper side of the clamp-bar H, equidistant from itsends and solid with it, is formed a spheroid, L, the surface of which corresponds with the inner surface of the cup-ring 6, into the crown of which ball, accompanied by a nut, n, is inserted the screw-bolt W, securing the parts- 4 in any desired relation to the face of the stone;

Over the ring 0, and being perforated at its crown for the bolt W, there is a cup-shaped cap, T, conforming to the washer 6, being also. held by the nut 12, connecting, asintended,. the frame D and clamp-bar H into one device.

To manipulate the invention, the slotted bar r is secured to the grindstone-frame at. any preferred distance from the stone, and.

the feet f ofthe frame D are set on the stubs 0. Then theball L is set in the ring e, over which is applied the cap '1, when the nut n is turned down, completing. the construction.

In operating the invention, between the jaws i and j is inserted the knifeebar F, andv the nutsn are turned down on the bolts 1,

holding the same for presenting the cuttersito the stonehat any angle with its face desired. By relaxing and tightening the nut-n the knife-bar is slipped laterally'in the clamp. As the clamp-bar is connected to the frame Dby a universal joint, the operator is enabled to present the cutters to the face of the stone so as-to grind all their cutting-edges alike straight; at the same time the basil is of any preferred slope with its disk, and all alike true in their-cross-section.

Having described my invention, what 1 claim, and wish to secure, is-

bf the slotted bar 7, having the studs 0, the

A-shaped frame D, having its apex a: formed j into the cup-ring e, and provided with the perforations p in the feet f, the clamp-bar H, having the jaws i and j, and provided with the, bolts 1 and nuts-u, the spheroid :L', at-

tached .t0-ihe-,bar H, providcd with the screw bolt W and nut .n,iand the cup-shaped .cap

;T, all arrangedifor the'purposesrsubstantially as set fonth.. j Intestimonywhereof-I have: hereunto set' my hand this 9th? day of-August, A. D. 1875.

MONROE M. GOPP:

Witnesses: r

A. U. PARSONS, E. A. PARSONS.

An improved grindingemachine, consisting 

